What to do?

Hello Michelle,
I have constructed an APK like format for Drupal 7 (not as a module) and use it for the members' profile pages in a small social network site. It does a great job. The owner of the page can customize information about himself, add his favorite videos, pictures, etc. All of those are in separate panes laid out in two columns on a panel page.
I would like to add the possibility for a visitor to the profile page, to leave comments including some HTML code (like posting a picture located on another server for example.)
I am a little bit at a loss on how to proceed with this at this point.
I cannot use a node where the commenter would see a new form, need to give it a title, etc. I am more looking at something like offered by Micro-publisher: A small box, permanently displayed, when a comment can be left and posted right below it. The problem with Micropublisher is that it is not fully integrated with Drupal 7 yet, and that may take some time. I use Statuses on another part of the site and I had to compromise a lot to get it to work properly there (including some recoding.) Comments do not work right on posted statuses, so I had to eliminate those until the issues are fixed.
Having said all that, I wonder what route you would take if you were in my shoes? Any pointer would be greatly appreciated.
Thanks. :)
Oliver.